Quote:
Originally Posted by nand chan
Can you detect any visible change when switching between the two?
|
Hard to say, but interestingly using the 'reset' one, dispcalGUI reports it as only 99.6% of grayscale values. For 0-128 output=input. For 129-255 output=input-1. Using the 'linear' shows 100% of grayscale input=output 0-255. For all we know, that could just be a bug in dispcalGUI though.
I'm thinking the 'reset' style ramp one must be a legacy thing or misinterpretation, since looking back, that is what older calibration programs like ProfileMaker 5 use.
Quote:
Maximum value for each color is 65280 instead of 65535. Why? Maximum number of 8-bit number is 0xFF (255). Maximum number of gradations for each channel is 256.
255 * 256 = 65280
|
A Google search came up with the above by a forum poster, but I'm not sure that is correct logic. 8-bit values range from 0-255 (256) which matches up with the 0-255 (256) gradations. Maybe there was a bug in old GPU hardware or drivers which made 8-bit 0x0 null and mapped 0x1 to 0 or was it just a case of poor documentation by Microsoft confusing people? Not something I think you need to worry about now, since there seems to have been a transition at some point to using 65535 as the maximum value in modern calibration software.